I have a friend who has a 17 year old son who plays football. He asked my opinion about supplements. His son is trying to add lean mass . He weighs around 174 pounds. His goal is to get his weight up to 185-190 by next football season. I told him at his son's age the best thing he could do was eat good and workout. He insisted that his son needed supplements. So I suggested a good protein powder and maybe BCAA's. Now he wants to add agmatine. Is that a good idea for a 17 year old? Do you guys and gals think I gave him good advice? Thanks